Rubio, who has been battling a sore hamstring through much of the series, aggravated it early and went to the locker room. He was ruled out for the rest of the game.
This is a blow to a Utah offense that struggles to create good offense (something that has been a particular problem in the early stages of Game 6). Rubio has averaged 16.8 points and 8.6 assists per game, and while he hasn’t been efficient (true shooting percentage of 47.7) he has scored enough to keep the OKC defense honest and open things up. He outplayed Westbrook, leading to Westbrook saying he would shut Rubio down (then played out of control trying to do so the next game).
Without Rubio, the Thunder defenders can focus more on stopping Donovan Mitchell.